A 22-year-old patient arrives in the emergency department following a motor vehicle accident. The patient is unconscious, and a CT scan reveals a subdural hematoma. The nurse knows that monitoring for increased intracranial pressure (ICP) is crucial. Which of the following signs would be an early indication of increased ICP?
A. Bradycardia
B. Hypotension
C. Decerebrate posturing
D. Widened pulse pressure
E. Pupil dilation and sluggish response
Rationale: Early signs of increased ICP include changes in level of consciousness and pupillary response due to the pressure on the oculomotor nerve. Pupil dilation and a sluggish response to light indicate early neural compromise. Bradycardia and widened pulse pressure are later signs, while decerebrate posturing indicates severe brain injury.
Question 2
A nurse is caring for a patient with a traumatic brain injury. The patient’s intracranial pressure monitor reads 20 mmHg. Which of the following interventions should the nurse prioritize?
A. Encouraging coughing and deep breathing exercises
B. Elevating the head of the bed to 30 degrees
C. Administering a stool softener
D. Frequent repositioning every 2 hours
E. Keeping the room lights bright
Rationale: Elevating the head of the bed to 30 degrees helps reduce ICP by promoting venous drainage from the head, thereby reducing cerebral edema and pressure. Coughing and deep breathing exercises might increase ICP, while stool softeners and repositioning are important but secondary in urgency. Bright lights can increase neuronal stimulation, which is not advisable in elevated ICP.
Question 3
A 35-year-old patient is admitted with a diagnosis of bacterial meningitis. The nurse knows that this condition can lead to increased intracranial pressure. Which of the following medications would the nurse expect to administer to control ICP?
A. Acetaminophen (Tylenol)
B. Mannitol (Osmitrol)
C. Amoxicillin (Amoxil)
D. Metoprolol (Lopressor)
E. Insulin regular (Humulin R)
Rationale: Mannitol is an osmotic diuretic used to reduce ICP by drawing fluid out of the brain tissue and into the bloodstream, decreasing cerebral edema. Acetaminophen is used for fever and pain but does not affect ICP directly. Amoxicillin is an antibiotic, and while it’s used to treat bacterial infections, it does not control ICP. Metoprolol and insulin do not play a role in managing ICP.
Question 4
A nurse is assessing a patient for signs of increased intracranial pressure. Which of the following findings would suggest a late sign of increased ICP?
A. Nausea
B. Headache
C. Decreased level of consciousness (LOC)
D. Cushing’s triad (bradycardia, hypertension, irregular respirations) E
. Blurred vision
Rationale: Cushing’s triad, consisting of bradycardia, hypertension, and irregular respirations, represents a late and ominous sign of significantly increased ICP, indicating brain stem compression. Early signs typically include headache, nausea, and blurred vision. A decreased LOC can be an early or late sign depending on the rate of ICP increase and the area of the brain affected.
Question 5
A patient with increased intracranial pressure is prescribed to receive hypertonic saline. The nurse understands that the primary reason for administering hypertonic saline is to:
A. Decrease cerebral oxygen demand
B. Increase cerebral blood flow
C. Reduce cerebral edema
D. Prevent seizures
E. Stabilize blood pressure
Rationale: Hypertonic saline works by creating an osmotic gradient that draws water out of the brain tissue, reducing cerebral edema and thereby decreasing intracranial pressure. It does not primarily affect cerebral oxygen demand, blood flow, seizure prevention, or blood pressure stabilization in the context of ICP management.
Question 6
During a night shift, a nurse notices a patient with increased ICP is having irregular breathing patterns. Which of the following actions should the nurse take first?
A. Prepare to administer hypertonic saline
B. Adjust the patient’s head to a neutral position
C. Increase the room oxygen supply
D. Administer a prescribed sedative
E. Document the observation and continue to monitor
Rationale: The first action in managing a patient with irregular breathing patterns and increased ICP should be to ensure the patient’s head is in a neutral position, as this facilitates venous drainage from the brain, potentially stabilizing or reducing ICP. Adjusting oxygen supply, administering medications, or solely documenting without action may not directly address the immediate concern of potentially worsening ICP due to poor venous drainage.
Question 7
A patient recovering from a brain injury suddenly exhibits a significant decrease in responsiveness and an increase in systolic blood pressure. The nurse recognizes these changes as possible signs of:
A. Hypovolemic shock
B. Septic shock
C. Increased intracranial pressure
D. Pulmonary embolism
E. Acute renal failure
Rationale: A significant decrease in responsiveness combined with an increase in systolic blood pressure are classic signs of increased intracranial pressure, particularly when associated with a brain injury. These symptoms can indicate brain compression and potential herniation, necessitating immediate intervention. The other options are not directly related to the symptoms described in the context of a recent brain injury.
Question 8
A nurse is teaching a group of nursing students about the management of patients with increased ICP. The nurse explains that maintaining patient body temperature is crucial. A fever can have which of the following effects on a patient with increased ICP?
A. Decreases cerebral metabolism
B. Reduces cerebral edema
C. Increases intracranial pressure
D. Stabilizes cerebral perfusion pressure
E. Enhances the effect of sedatives
Rationale: Fever can increase intracranial pressure in patients with neurological injuries by increasing the metabolic demands of the brain, thereby exacerbating cerebral edema. This increase in metabolism requires more blood flow, potentially raising ICP. Decreasing cerebral metabolism, reducing edema, stabilizing perfusion pressure, or enhancing sedative effects do not directly result from fever in the context of increased ICP management.
Question 9
A 28-year-old patient with a head injury is being monitored for intracranial pressure. The nurse knows that maintaining adequate cerebral perfusion pressure (CPP) is essential. The CPP is calculated by subtracting the ICP from the mean arterial pressure (MAP). If the patient’s MAP is 90 mmHg and the ICP is 20 mmHg, what is the CPP?
A. 50 mmHg
B. 70 mmHg
C. 110 mmHg
D. 90 mmHg
E. 70 mmHg
Rationale: Cerebral perfusion pressure (CPP) is a critical measurement in patients with brain injuries, reflecting the pressure gradient driving cerebral blood flow. It is calculated by subtracting the intracranial pressure (ICP) from the mean arterial pressure (MAP). In this case, CPP = MAP – ICP = 90 mmHg – 20 mmHg = 70 mmHg. A CPP of 70 mmHg is within the lower range of normal, indicating that interventions to maintain or increase CPP may be necessary to ensure adequate cerebral blood flow.
Question 10
While assessing a patient with a head injury, the nurse notes an increase in systolic blood pressure, a decrease in heart rate, and irregular respirations. The nurse correctly identifies these findings as:
A. Neurogenic shock
B. Cushing’s triad
C. A sign of hypoxemia
D. Parasympathetic overstimulation
E. Signs of a systemic inflammatory response
Rationale: Cushing’s triad, which consists of an increase in systolic blood pressure (widened pulse pressure), a decrease in heart rate (bradycardia), and irregular respirations, is a late sign of increased intracranial pressure indicating brain stem compression. This triad is a critical sign of deteriorating neurological status requiring immediate intervention to prevent further brain injury or death. Neurogenic shock, hypoxemia, parasympathetic overstimulation, and a systemic inflammatory response present with different clinical signs and are not directly indicative of increased ICP.